海南岛金波地区发现杜内早期腕足动物群

Early Tournaisian Brachiopod Fauna in Jinbo Area, Hainan Island

白沙县金波附近的Spirifercf.,subgrandisRotai ,Neospirifersp .,Fuselacf.tornacensis (Koninck) ,Punc tospirifersp .,Mucrospirifersp .,Eumetriacfserpentina (Koninck) ,Palaeochoristiessp .,Megachonetessp .,Pli chonetessp .,Orthotetessp .,Chonetipustulasp .,Marginatiasp .,Curithyrissp .,Rhipidomellasp .是海南岛首次发现的最丰富的杜内早期腕足动物群。据此 ,该地区含化石的原南好组第四段确定为下石炭统岩关阶。该动物群以石燕贝类最繁盛、长身贝类数量少为特征 。

The very abundant brachiopods including Spirifer cf., subgrandis Rotai, Neospirifer sp., Fusella cf., tornacensis (Koninck), Punctospirifer sp., Mucrospirifer sp., Eumetria cf., serpentina (Koninck), palaeochoristites sp., Megachonetes sp., Plichonetes sp., Orthotetes sp., Chonetipustula sp., Marginatia sp., Curithyris sp., and Rhipidomella sp. were found for the first time at the Jinbo area, the northwest part of Hainan Island. That fauna indicates an Early Tournaisian in age. Accordingly, the fossil-bearing rocks, the Member 4 of former Nanhao Formation is now placed into the Aikuanian Stage. That fauna characterized by the flourishing of spiriferoid and the sparseness of productoids quite differs from the coeval brachiopod faunas of South China.